/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 */
package org.apache.causeway.viewer.wicket.model.causeway;

import java.util.function.UnaryOperator;

import org.apache.causeway.applib.services.iactnlayer.InteractionContext;

import lombok.NonNull;

/**
 * Introduced, to allow for authenticated sessions to be amended with time-zone information
 * (post sign-in).
 *
 * @since 2.0
 */
public interface HasAmendableInteractionContext {

    /**
     * Replaces the held {@link InteractionContext} with an amended version.
     *
     * @param updater - operator must allow <code>null</code> argument
     *      and is allowed to return <code>null</code> (required)
     */
    void amendInteractionContext(@NonNull UnaryOperator<InteractionContext> updater);

}
